After Mazda ended its partnership with Ford, it had to come up with new in-house developed products to prove itself. The third-generation Mazda 6 is one of them. It’s a sleek sporty front-wheel drive family sedan.
The 2014-2019 Mazda 6 comes only with a 2.5L 4-cylinder engine. Thanks to Skyactiv technology, Mazda 6 is one of the most fuel-efficient family sedans on the market.
For 2018, the 2.5L turbo 4-cylinder engine has been added to the lineup. Mazda 6 is a driver-oriented vehicle, it holds the road very well, with precise, well-controlled steering. The ride is on the firm side. The 6 comes with a six-speed manual or six-speed automatic transmission. The reliability is above average, but there have been some problems used car buyers should be aware of.
Mazda 6 problems: There have been several complaints about the mass air flow sensor failing. A bad mass air flow sensor can cause a no-start condition and stalling. The sensor is easy to replace; it’s located on the air filter box. The part is sold online for $135-$160.
A sticking switch inside the transmission shifter assembly can cause the vehicle to stay intermittently in the Accessory mode with the audio system staying on and draining the battery. There are a number of reports on the NHTSA website about this issue. To repair the problem, the switch or the whole shifter lever assembly must be replaced ($320-$550 repair).
A failed ignition coil can cause a lack of power and the Check Engine light to come on with misfiring trouble codes. The bad ignition coil must be replaced with an updated part. It’s a good idea to replace all the spark plugs at the same time if they are old.
There have been numerous complaints about Bluetooth issues. If it’s important to you, try pairing your phone and see if it works when checking a used Mazda 6. Many owners report that the Bluetooth moduel has been replaced.
At higher mileage, carbon buildup on the intake valves can also cause the engine to misfire. This problem is common for direct-injected engines. The solution is to clean the valves with a special spray or manually. When replacing a drive belt, the drive belt tensioner might need to be replaced too if leaking; it’s not very expensive.
To clean the valves manually, the intake manifold has to come off.
Several owners mentioned various problems with Mazda Connect infotainment system. Some glitches were fixed with firmware updates or resets. Check for more information at the Mazda Connect website. The overall number of complaints is small compared to some other cars. Mazda issued several recalls.
Engine: The base engine is the 184-hp 2.5L DOHC 4-cylinder Skyactiv-G motor. It has a higher compression ratio (13.0:1) and direct fuel injection. It’s one of the best engines on the market. It has proven to be reliable if maintained well.
For 2018, the Skyactiv-G 2.5L engine received the cylinder deactivation option.
The 227-hp turbocharged version (Skyactiv 2.5T) was also added for 2018. The 2.5L turbo is a fairly new engine to know its long-term reliability. This engine has been used in the 2016 and newer Mazda CX-9 SUV and so far it didn’t have too many problems. A turbocharged engine is sensitive to the oil quality; use only high-quality synthetic oil.
Timing belt or chain: Bot the 2.5L and 2.5T Skyactiv gasoline engines have a timing chain that doesn’t need regular replacement. There is no timing belt.
|Mazda 6 EPA Fuel Economy:||mpg|
|2014-2015 2.5L with i-ELOOP auto||28/39||8.4/6.0|
|2016 2.5L with i-ELOOP auto||28/38||8.4/6.2|
|2017 2.5L with i-ELOOP auto||27/35||8.7/6.7|
|2014-2016 2.5L auto||26/37||9.0/6.4|
|2017-2019 2.5L auto||26/35||9.0/6.7|
|2014, 2016 2.5L 6-speed manual||25/36||9.4/6.5|
|2015 2.5L 6-speed manual||25/35||9.4/6.7|
|2017 2.5L 6-speed manual||24/34||9.8/6.9|
|2018-2019 2.5L 6-speed manual||24/33||9.8/7.1|
|2018-2019 2.5L Turbo auto||23/31||10.2/7.6|
Fuel Economy: The 2015 Mazda 6 automatic with i-ELOOP system is rated at 28/39 mpg city/hwy. The i-ELOOP system, available in the GT Technology Package uses a capacitor installed inside the front fender to recover the energy when slowing down to re-use later. It’s like a very mild hybrid.
The regular 2014-2016 Mazda 6 automatic gets 26 mpg city, 37 mpg highway. This allows Mazda 6 to travel up to 574 highway miles (924 km) on one tank of regular gasoline.
Pros: Fuel economy, sporty handling, supportive seats, conventional 6-speed automatic transmission, available 6-speed manual, 5-star crash test rating, available safety features, rich interior.
Cons: Road and wind noise in earlier models, dash rattles in earlier models, firm ride, no V6 option, rear seat space, low front bumper is easy to scrape, OEM tires wear out fast, the trunk is not very large.
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- Mazda 6 2009-2013 review
Overall: Mazda 6 is a sporty option for a family sedan. Overall, it’s a great car, but earlier models are not very quiet inside. The 2017 and later models have better sound insulation.
Mazda 6 trunk offers 14.8 cu. ft. of cargo space
The rear seat folded
The reliability is above average, maintenance costs are low too. We would recommend a non-turbo Mazda 6 if you plan on keeping the car for many years.